Japanese professional. Born 1645, died 1702.
Was head of the Honinbo school and Meijin Godokoro.
For a more detailed biography and some games, check out the Dosaku index on the Momoyama? site.
Dosaku's pupils included Dochi, Doteki, Sakuun, Bokunyu and Inoue Yuseki. Also Horibe Innyu.